Buggy code:
public class StandardJMeterEngine implements Runnable , JMeterEngine , JMeterThreadMonitor { private static final Logger log = LoggingManager . getLoggerForClass ( ) ; private static final long serialVersionUID = 233L ; private static final long WAIT_TO_DIE = JMeterUtils . getPropDefault ( "jmeterengine.threadstop.wait" , ( 5 * 1000 ) ) ; private static final int UDP_PORT = JMeterUtils . getPropDefault ( "jmeterengine.nongui.port" , 4445 ) ; private static final boolean exitAfterTest = JMeterUtils . getPropDefault ( "server.exitaftertest" , false ) ; private static final boolean startListenersLater = JMeterUtils . getPropDefault ( "jmeterengine.startlistenerslater" , true ) ; private static volatile StandardJMeterEngine engine ; private static final List < TestListener > testList = new ArrayList < TestListener > ( ) ; private final Map < JMeterThread , Thread > allThreads ; private volatile boolean running = false ; private volatile boolean active = false ; private volatile boolean serialized = false ; private HashTree test ; private volatile SearchByClass < TestListener > testListenersSave ; private final String host ; public static void stopEngineNow ( ) { } public static void stopEngine ( ) { } public static synchronized void register ( TestListener tl ) { } public static boolean stopThread ( String threadName ) { } public static boolean stopThreadNow ( String threadName ) { } private static boolean stopThread ( String threadName , boolean now ) { } public StandardJMeterEngine ( ) { } public StandardJMeterEngine ( String host ) { } public void configure ( HashTree testTree ) { } private static class MyThreadGroup extends ThreadGroup { public MyThreadGroup ( String s ) { } @ Override public void uncaughtException ( Thread t , Throwable e ) { } } public void runTest ( ) throws JMeterEngineException { if ( ( host ) != null ) { long now = System . currentTimeMillis ( ) ; System . out . println ( ( ( ( ( ( ( "Starting<seq2seq4repair_space>the<seq2seq4repair_space>test<seq2seq4repair_space>on<seq2seq4repair_space>host<seq2seq4repair_space>" + ( host ) ) + "<seq2seq4repair_space>@<seq2seq4repair_space>" ) + ( new Date ( now ) ) ) + "<seq2seq4repair_space>(" ) + now ) + ")" ) ) ; } try { Thread runningThread = new Thread ( new StandardJMeterEngine . MyThreadGroup ( "JMeterThreadGroup" ) , this ) ; runningThread . start ( ) ; if ( ( JMeter . isNonGUI ( ) ) && ( ( StandardJMeterEngine . UDP_PORT ) > 1000 ) ) { Thread waiter = new Thread ( ) { @ Override public void run ( ) { waitForSignals ( ) ; } } ; waiter . setDaemon ( true ) ; waiter . start ( ) ; } } catch ( Exception err ) { stopTest ( ) ; StringWriter string = new StringWriter ( ) ; PrintWriter writer = new PrintWriter ( string ) ; err . printStackTrace ( writer ) ; <START_BUG> throw new JMeterEngineException ( string . toString ( ) ) ; <END_BUG> } } private void waitForSignals ( ) { } private void removeThreadGroups ( List < ? > elements ) { } @ SuppressWarnings ( "deprecation" ) private void notifyTestListenersOfStart ( SearchByClass < TestListener > testListeners ) { } private void notifyTestListenersOfEnd ( SearchByClass < TestListener > testListeners ) { } private ListedHashTree cloneTree ( ListedHashTree tree ) { } public void reset ( ) { } public synchronized void threadFinished ( JMeterThread thread ) { } public synchronized void stopTest ( ) { } public synchronized void stopTest ( boolean b ) { } private class StopTest implements Runnable { private final boolean now ; private StopTest ( boolean b ) { } public void run ( ) { } } public void run ( ) { } private String startThreadGroup ( AbstractThreadGroup group , int groupCount , SearchByClass < ? > searcher , List < ? > testLevelElements , ListenerNotifier notifier ) { } private boolean verifyThreadsStopped ( ) { } private void waitThreadsStopped ( ) { } private void tellThreadsToStop ( ) { } public void askThreadsToStop ( ) { } private void stopAllThreads ( ) { } public void exit ( ) { } private void pause ( long ms ) { } public void setProperties ( Properties p ) { } public boolean isActive ( ) { } }

Fix:
throw new JMeterEngineException ( err ) ;